Ford S-Max significant exhaust noise increase once or twice a month

Car: Ford S-Max
Variant: 2.0 TDCI
Model Year: 2010
Categories: Engine & Drivetrain
On rare/random occasions the exhaust noise increases significantly. It sounds like there is a hole in the exhaust. Usually only returns to normal after switching off the engine. When standing outside during or just after an event, there is a burning smell. No loss of performance, just noise/burning smell. Any idea what the intermittent problem maybe? Rog
Posted: Oct 21, 2011 (13 years ago)
surly this car should still be covered by warantee same symtoms as an egr valve sticking open
Posted Oct 21, 2011 (13 years ago)
Probably the perfectly normal symptoms of Particulate Filter (DPF) regeneration. Nothing to worry about .
Posted Oct 21, 2011 (13 years ago)

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